Traffic light



FIG. 1 is a perspective view of a traffic light showing my new design;

FIG. 2 is a side elevational view thereof from the lower right of FIG. 1;

FIG. 3 is a side elevational view thereof from the side opposite that shown in FIG. 2;

FIG. 4 is a side elevational view thereof from the left of FIG. 3; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a traffic light, as shown. 